Yes. Mark the Amended Box. Make the changes. Attach an explanation of the changes.

Why not efile it?

Thanks very much.

Had previously efiled this 2109 amended 1120S. Pro Series doesn't seem to process 2nd amended '19 return. Probably the technically inept User! I'll just certify mail.

So is it necessary to send entire multi page return? Or can get by with less?

Regards,

Charlie Allnut

@sjrcpa since there is no change in income, is the amended necessary? Could they file a 8822-B to do a change of address and make the other changes on the next return filed? 

Thank you both.

Regardless we have to file an amended 2019 return. And will include the entire return. We got rejected for a govt grant because our 2019 1120S didn't reflect the appropriate Activity Code. We'll appeal after mail in the amended return. When I took over doing this 1120S from a very good CPA firm, I just kept using the same activity code they'd been using for several years.

Thank you again

@Pablo in my opinion activity codes are very important... Because if the numbers on the return are not what is expected based on ratios and the average on other returns with that same activity code then a red flag for audit could be thrown up....

Very good point. Noted with thanks