Can I back up today (May 10), then start new fiscal year and record entries for May, then later on restore the back-up, do y/e aje's then start fiscal year(again) and "re enter " May transactions?

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Hi everyone!  Our year end is April 30, but I am still waiting for our accountant to finalise year ending April 30 2021.  So if I start a new fiscal year, I cannot go back to April 2021 to do the accountant's year end journal entries. (I can only work in May 21 to April 22).   I hope to have them this month.  In the meanwhile I need to run payroll for May 15th.  I am wondering if I do a back up today, then start a fiscal new year, run payroll and do whatever is necessary, then when I get the finalised year end back from our accountant, if I could restore the back up for today, do the year end entries and then roll over the new fiscal year.  At this point I would then re-create/enter the May journal entries which I had done this week.  Do you think that would work or does anyone have another idea / solution for this situation?  Thanks for your input.