Google sheets expert needed, help setting up a dynamic calendar within a spreadsheet

Hi, I have a simple budgeting spreadsheet for 3 consecutive months which has an 'income/expenses' tab and a 'calendar' tab. The calendar tab has each of the 3 months of the year saved to it. I'd like to have the functionality so that when you enter your 'salary' and 'bills/debt' payment that the 'income/bill' type is also transferred into the corresponding date in the calendar acting as a "date due" tracker. Currently data for expenses/income is typed into a certain section which is then added using a formula into the corresponding tables. Screenshots provided.

Additionally happy to also consider a calendar using filters ie option to have a month selected from a dropdown list which you can view any income/expenses coming up for the selected month.

Thank you and please let me know if you have any questions before offering your bid.