Hi, Ahmad …
CRA is quite particular about the T183. If they send you a request to send them copies of the T183 forms (ie: usually 25 unique forms of specific clients that they want to review), they will question you if your copies don’t match the information submitted to them during e-file. CRA may terminate your e-file license if there are a lot of unjustifiable errors.
At minimum, you should record a note on file to document the reason why the DCN number is different than what you submitted to remind you about it in case CRA asks for that specific T183 form - at least this way you can explain the mishap to CRA if they ask for an explanation. If you printed your documents to PDF before e-filing, it would be wise to have your client come in and sign a copy of the form with the correct DCN on it, as it would be better to have a correct version vs the incorrect version. The timestamp information on the document needs to be from a prior date to e-file.
I don’t understand your 2nd question: “Do you normally attached/upload a photo of the signed T183 to Profile before you efile?” If you are referring to Profile’s cloud storage site, I personally don’t like it and thus don’t use it. I have my own Canadian based, end-to-end encrypted cloud storage site that I use (Sync.com), which works quite well in keeping my documents backed up for remote storage. I typically print all my client files to PDF, and then use the PDF copies to print my client files. I don’t like the way Profile prints duplex files, so printing from PDF solves this problem for me (although it adds an extra step). It also guarantees that I also always have a pdf copy of information before it was e-filed to CRA. Hope this helps.
I didn’t renew my Profile license for 2020 tax year, and will be using TaxCycle moving forward.