Attach Supporting Documents to a CO-17 Return

During the electronic transmission of the returns, it is possible to attach supporting documents to CO-17 returns to help with their processing. To do so, the EFILE status must be other than "Not applicable."

If you want to attach a supporting document to a return, you must proceed as indicated in the Attach a file to a return  help topic, and select the supporting documents to transmit within the eligible files attached to the return. It is possible to select them when preparing the return or when transmitting. You can transmit .gif, .jpg or .pdf file types. The .jpeg type file must be renamed with the .jpg extension. You can select as many .gif, .jpg ou .pdf files as necessary. However, if you transmit .pdf type files, you will only be able to transmit one supporting document.

Note: The password will be required when you attempt to modify the list of supporting documents in a password-protected client file.

Although Revenu Québec only accepts one supporting-document file, Corporate Taxprep allows you to combine as many .gif and .jpg files as required in a PDF file. However, if you select a PDF file, you can only transmit one file.

The addition of several supporting documents can considerably increase the size of the file to transmit. Thus, we recommend that you validate the size of the files when you select them and to reduce their number and the resolution, if necessary.

For Acrobat Writer users, it is possible to merge several PDF documents and to modify the resolution settings and compression rate when creating PDF documents. See the Acrobat Help for more details.

Revenu Québec set a maximum file size limit for electronic transmission of data. This limit has been set to 30 MB. To prevent the file from being rejected, Corporate Taxprep allows you to validate that the size complies with the pre-set limit. This validation can be done automatically, right before transmission of the return or upon request when selecting the documents to transmit. In the second case, if several supporting documents have been selected, they can be viewed in PDF format.

Once the validation is performed, a message is displayed to advise you of the validation result and to suggest other possible options, if applicable. If you choose to transmit the return without supporting documents, a note to that effect will be entered in the transmission log.