Can we charge depreciation on residential flat in IT RETURN Or not?

Sir, I have submitted ITR 1 for AY 20-21. ITR Processed and AO is received through mail. but refund is not credited to my account. I found that have entered 1 digit extra in my account )i.e. my acount is in IDBI Bank having 15 digits account no. but I entered 16 digits. When I saw service request in Income tax portal it shows refund credited.
Now my question "IDBI Account number consists 15 digits but I entered 16 digits how it is credited."
Is there any other option to get back refund or I may write refund request.

Our co by mistake make invoices on einvoice trial portal for 3 days i.e. 1st to 3rd Jan...instead of making bill on e invoice portal.
E way bill also prepared on e way bill website what to do?
Whether these bills can now be uploaded on einvoice portal?

CONTRACT SERVICE COVERED U/S. 44 AD OR NOT? PLEASE REPLY.

goods purchases by us from delhi, but seller make Delivery challan instead of Invoice for delivery goods to UP. Deptt. charges GST and Penalty on Goods value @ 18% GST+18% penalty. under IGST Head
Now can we take input of IGST tax in GST return, if yes, what type of document require for the same

If a builder retains 3 flats out of 8 constructed flats in an amalgamated plot of land constructed by builder (own by builder and some other land owner) and he transferred 2 Flats to another land owner as a part of land consideration then what is the turnover for 44AD and how the cost of 5 flats shall be calculated and if do not opt for 44AD then how to show turnover in profit and loss account and what will be the value?

My appeal was pending before CIT-A and few hearings had taken place when e-proceedings -Appeal system came in to operation. Now a fresh notice is issued under e proceedings asking to file submissions for hearing.
Our submissions and Paper book consisting over 100 pages were already submitted to CIT-A who had conducted hearings under physical system.
Do I have to upload these on e-processing again or just respond - "refer to submissions already made before CIT-A -- " Will the existing files be not passed to CIT-A who will be assigned to hear and decide the case? Will the hearings take place as if it is a new appeal and hearings already conducted and documents submitted as part of Paper Book will be ignored?

can you let me know if I go with new tax regim 2020 would I be eligible for section 54f exemption?

While uploading json file of invoice on e invoice portal a message is displayed GSTIN is not valid while E way bill is prepared with the same gst no what to do?

An individual is running a stationery shop with turnover for FY 19-20 is within Rs 4 lakhs. While submitting his IT return whether business books should be signed by CA? Which ITR form is required for IT submission? What is the due date for FY 19-20?