Auto completion and filling through multiple sheets

Hi all you wonderfully knowledgeable spreadsheet gurus,

I have looked through everywhere and cannot seem to find what I'm trying to do. I have a spreadsheet where I have multiple sheets. The first is a sheet for my budget with breakdowns for different sections (Blocks) and further breakdown within. I then used different sheets for data entry for each section. I was later asked for a more detailed breakdown so made a ledger to enter all info in. I now am doing the same entries twice, first into the ledger then into the data sheet. What I am trying to do now is eliminate the data entry sheet (or automate it - whichever is easier) and only use the ledger for entry. What I can't figure out is how to pull/point/push the info properly into the main budget sheet. I am attaching a scaled down copy of what I have created and am hoping someone may be able to point me in the right direction.

Thanks in advance for your help
djw

*Edit - I created it and am using in Google Sheets