Can I take the advantage of 18% GST that I've paid, if my private limited firm is sponsoring the course for me?

how to present Debit note and credit note in GSTR-3B.

Dear Sir,
We are a manufacturing Company having taxable turnover of less than 20 crore in previous financial year (F.Y. 2021-22). One of our customer have raised a debit note in the month of sep 2021 and does not shown that Debit Note in GST and now he is giving that debit note and want to raise credit note on 31st march 2022. What to do next as we have already filed GST return for March 2022

I had filed ITR -7 for AY 2020-21 on 27-01-2021 (due date was 15-02-2021) and also filed Audit Report in Form 10B on 27-01-2021 (Due date was 15-01-2021).

The CPC had disallowed expenditure claimed (revenue and capital) and taxed @ 30% on Gross Receipts.

Rectification request to reprocess was also processed with demand due?

What is the course available to clear the demand ?

whether GST Input can be claimed for location of supply is different from Registered place.

GST Input before registration can not be claimed under which SECTION.

1: Please let me know whether Vested RSU till previous year are required to file in returns? And whether separate entries for same stock with different vested dates are to be entered.
2: Whether RSU vested upto Dec21 and sold are to be disclosed or from Jan-22 to March22 sold RSU are also required to disclose?
3: The capital gains of sold RSU from Jan-22 to March-22 are to be considered for calculation of income for Fy2021-2022?
Pl elaborate

Where to see GST input interstate for Lodging in hotel and rent paid for interstate in GSTR-3B Returns.

Constructed building on industrial plot in 2010 . Cost of construction only ( Plot cost extra) 22 LAKHs
Sold in April 2022. Depriciated value as on 31.03.2022 is 7.5 Lakhs.
For calculation of LTCG, cost of Plot will be as per cost index. What will be the building cost 22 Lakhs or 7.5 Lakhs.
K B Garg

In form 3cd , while filing
26 (i)B was incurred in the previous year and was
26 (i)(B)(a) Paid on or before the due date for furnishing the return of income of the previous year under section 139(1)
S.No. Section Nature of liability Amount
1 Sec 43B(a)-Tax,Duty,Cess,Fee etc Professional Tax payable 64401
2 Sec 43B(a)-Tax,Duty,Cess,Fee etc TDS payable 651201

This expenses has been disallowed even though is has been paid before due date and refund got adjusted against liability .
Does anyone faced similar issue , what measures taken