In 2026, the date in 1C is determined according to the type of transaction: as a general rule, VAT on purchased goods, work, and services is credited in the tax period in which the date of their receipt falls (Article 481 of the Tax Code of the Republic of Kazakhstan), while a corrected invoice specifies its issue date and the issue date of the cancelled invoice (Article 499 of the Tax Code of the Republic of Kazakhstan).
What the date in 1C means
A date in 1C is an attribute value that the software uses to record a document in an accounting period, arrange the sequence of transactions, and generate reports. Fields that look identical may serve different purposes: the date when a document was created, a business transaction was performed, a payment was made, products were manufactured, an asset was recognised, or an entry was generated.
Therefore, it is not enough for an accountant to ensure that the calendar value has been entered correctly from a technical standpoint. It is necessary to check whether it corresponds to the source document and the economic substance of the transaction. If the date is selected incorrectly, the document may be included in the wrong period, while the related postings and reports may be generated in the wrong sequence.
For VAT purposes, the date depends on the specific situation. As a general rule, VAT credited on purchased goods, work, and services is recognised in the period in which the date of their receipt falls. Other dates are prescribed for certain transactions: for example, when importing goods from states that are not members of the EAEU, the goods release date applies, while for the purchase of work or services from a non-resident that constitute the purchaser's turnover, the electronic invoice issue date applies (Article 481 of the Tax Code of the Republic of Kazakhstan).
Before posting a document, it is useful to verify:
- the date against the source document;
- the organisation and transaction type;
- the contract, counterparty, and basis for the document;
- the accounting and tax periods;
- whether there are related documents created earlier or later;
- whether changes to an already closed period are permitted.
If a document is corrected retroactively, its effect on statutory reports and related transactions should be assessed. Simply changing the date may alter not only the document's position in the journal but also the accounting result. Special rules apply to a corrected invoice: the previously issued invoice is cancelled, while the corrected invoice must contain its own number and issue date, as well as the number and date of the cancelled invoice (Article 499 of the Tax Code of the Republic of Kazakhstan).
How to enter a date and find the cause of an error
If the field is editable, the date should be entered as a calendar value rather than arbitrary text. The exact display format depends on the software settings and document form, so it is safer to use the built-in date picker and check the resulting value before posting.
When 1C does not accept a date, first read the entire message. It usually indicates a technical condition that has not been met. The cause may not be limited to the visible field: the value is sometimes passed from another document, a setting, an exchange parameter, or a marking code.
Practical verification procedure:
- Identify the document, form, or processing routine in which the message appeared.
- Check that the date and related attributes have been completed.
- Compare the value with the source document.
- Ensure that the date is not repeated where the form requires a unique set of values.
- If the data is loaded automatically, check the source string and conversion rules.
- After making the correction, repeat the action and ensure that the document produces the expected result.
Do not select a date merely to make the message disappear. If the value does not correspond to the source document or the accounting rule for the specific transaction, a document that has been successfully posted from a technical standpoint may be recognised in the wrong period. For example, the date when goods, work, or services are received affects the period in which VAT is credited under the general rule (Article 481 of the Tax Code of the Republic of Kazakhstan).
Date errors in 1C: what to check
The message “Date %1 has already been entered” is associated with the date selection form. Under the specified condition, the software checks whether the value is present in the collection of unique values. Therefore, first find the duplicate date and determine whether duplication is permissible based on the substance of the transaction. If the form requires unique dates, the duplicate should be removed or replaced with the factually correct value.
The message “Error converting parameter value %1 to a date” occurs when parsing marking codes. Under the specified condition, the transmitted value does not consist solely of digits. In this situation, check the source parameter: it may contain letters, spaces, separators, or other characters that prevent conversion.
This error indicates an input data format problem and does not in itself mean that the accountant has determined the transaction date incorrectly. If the value was received through data exchange, from a scanner, or from an external system, it is important to check the data source. Manually correcting the result without eliminating the cause may lead to the error recurring.
When contacting a specialist, it is advisable to provide the exact message text, configuration name, release number, the action performed before the error, and an example of the source value without confidential data. This helps distinguish a completion error from a data exchange or processing problem.
Fixed asset manufacture date and 1C release date
The query “1C fixed asset manufacture date” may refer to two different things. If it concerns a fixed asset, the accountant should determine which specific date is required: manufacture, acquisition, commissioning, or recognition. These events should not automatically be treated as occurring on the same date. The value is selected based on the documents and the purpose of the specific attribute in the form.
If “OS” means an operating system, its release date is not the same as the release date of the 1C platform or configuration. For diagnostic purposes, the versions of the software and environment in use should be recorded because the operation of a form or processing routine may depend on them.
The 1C release date should be distinguished from the infobase date and the date of a business document. A release describes the software product version but does not determine the accounting period of a transaction. In 2026, the current release branch of “Accounting for Kazakhstan” is 3.0.74.x, while that of “Payroll and HR Management for Kazakhstan” is 3.1.37.x. The installed version number should be checked in the software information, and release details should be found in the documentation for the corresponding product.
After an update, the result of the specific scenario should be checked: opening the form, loading data, posting the document, and generating the report. If the problem appeared after an update, the versions before and after the update must be specified when describing the error.
Frequently asked questions
How do I change a document date in 1C? — Open the document, compare the date with the source document, and change the editable attribute. Before posting it again, assess the effect on the period and related documents; the exact location of the command depends on the configuration. If an invoice is being corrected, follow the procedure for cancelling it and issuing a corrected invoice (Article 499 of the Tax Code of the Republic of Kazakhstan).
Why does 1C say that the date has already been entered? — A duplicate value was found in the date selection form where the software checks for uniqueness. Find the duplicate and retain only the factually correct values.
What should I do if an error occurs when converting a parameter to a date? — Check the source value for letters, spaces, separators, and other characters. In the specified scenario, the error condition is caused by the string containing characters other than digits.
Where can I find the release date of a 1C version? — First identify the exact configuration name and version number in the software information, then compare them with the documentation for the corresponding product. The release date is not the same as the date of an accounting document.
Which article of the Tax Code of the Republic of Kazakhstan determines the date in 1C? — There is no separate rule for the “Date” software attribute: the provision governing the specific transaction applies. For example, the period in which VAT is credited is determined under Article 481 of the Tax Code of the Republic of Kazakhstan, while the dates required for a corrected invoice are determined under Article 499 of the Tax Code of the Republic of Kazakhstan.