Changing account to tax exempt interest doesn't seem to affect the P&L

I've been doing some housekeeping in the books. I was looking at the tax return for 2020 and saw that it was considerably off from the P&L in QBO. I realized that at the time the COVID Grant money we received was categorized as Other Income (we weren't' sure how all that stuff would play out) and it was showing on the P&L. Our accountant said that it didn't need to be and therefore the NET INCOME was off by this much. So I went and changed the detailed type for the account where I had the grant money recorded to Tax-Exempt Interest just so that it wouldn't affect the P&L. But.... alas it didn't have the affect I was looking for.

Now the P&L report I have, is based on the Classic View from Standard Reports. Customized to the year period and saved to the Custom Group Tab under the appropriate financial year group. IN OTHER words Intuit saw fit not to allow Modern View reports (which allow filtering) to be saved to Customized Groups. So please don't someone say "Just filter your report"!

I can switch to Modern View and filter out that account and then the P&L matches the Income Tax Return but I'm not allowed to save it. I can switch back to Classic View but of course the filter disappears.

Can someone else please tell me another way to run the P&L for that year and not include the Grant Money as Other Income>Tax-Exempt Interest?  I considered using Income>Non-Profit Income but I thought that might affect things I didn't want affected.