How to customize/ extend the standard design report in D365
Report Design is VendAccountStatementInt (Report in AOT)
How to add the customize/extend the new text box / fields in standard design report in D365
Please tell me the procedure in D365 Report designs in standard
How to extends the design in D365
Unfortunately it’s not as easy as extending a form design, for example. You can’t extend a report resign, but you can duplicate a report, modify a copy and extend menu items to use your new report instead of the standard one.
You can find more information in D365FO documentation: Customize through extension and overlayering > Report extensions.