This seems quite mundane after reading some of the things the rest of you are
working on, but!

I am building a payment booklet. I will be putting 4 payment coupons on each
page, to total 180. I put the start date in a cell (and the payment # in
another). I copy and pasted to the next section of the sheet adding an
=(above cell)+1 on the payment number and that works.
I can not find anything that works with the month. I want the payment due
the first of each month but with the varied # of days in the months I get
varied results if I use +30 or +31. Any help?

Thanks