How can I repeat invoice every month for all customers it’s for regular payments of rent

Hello Trev1963, 

Welcome to the Community page, 

What you can do for this is a recurring transaction, 

If you go to the cog wheel top right>under lists is recurring transactions click that>new top right>select transaction type so your case would be invoices>ok>then fill out all the information it is asking you for>save template. 

You will have to create the invoice for this month but next month it will automatically create it for you. 

If you have any other quires feel free to reach back out to us.