Whether RCM payable on purchase from unregistered person ?

Hi,
I had completed my articleship in 2016 but completion certificate not received as I didn't submitted form 112 at that time. Later in may 2021 i paid penal fees and submitted the pending form which status is still in process.
Today when i tried applying CA final exam Nov 22 attempt, i got an error "your articleship status is registered inactive, you will be provided with provisional enrollment reason".
What does it mean, am i eligible to give an attempt or not. Please help

Respected sir,
i am going to file gstr-9 for 2021-2022
i have input of 2019-2020 as rs 50000
input of 2021-2022 40000
input claimed in gstr-3b 80000
input in 2a 40000
input claimed in april.2022 10000 due to lat upload by seller
please any one advice me which amount and where to show in gstr-9

EXCESS LIABILITY & EXCESS ITC CLAIMED FOR SAME AMOUNT DUE TO CLERIKAL MISTAKE IN THE YEAR 2017-18
SIR DUE TO CLERICAL MISTAKE I HAVE TAKEN 2 LACS IN LIABILTY AND SAME EXCESS ITC HAS BEEN TAKEN.
NOW WE HAVE RECEIVED NOTICE U/S 61
WHAT TO DO IN BEST

Sir,
A Gst registered regular scheme dealer two invoices not reflected in gstr2a/2b July -22 month . reason supplier invoices uploaded cut off date:13-08-22 after uploading.
Question:
Dealer itc claim taken as per 36(4) provision applicable July -22 month or next month claim or july-22 filed interest pay.

Hi, I am CA final (old) ,took a break of 4 yrs & last month converted to new final course. Paid Rs 1000. Heard i will get books after applying for conversion but not yet received anything. Don't know how to proceed & whom to connect with. Could you please let me know how should I proceed with & what should I do further.

Dears Sirs

A taxpayer (recipient) has an invoice of oct 2017 which was claimed in GSTR-3B during the FY 2017-18. But the supplier filed GSTR-1 of that tax period of FY 2017-18 in June 2019. The due date to claim ITC for FY 2017-18 is Apr 2019. Will the taxpayer (recipient) have to reverse the ITC of that invoice now ???

As per this amendment
(Provided that the back-up of the books of account and other books and papers of the company is maintained in electronic mode, including at a place outside India, if any, shall be kept in servers physically located in India on a daily basis.)
is required to keep the daily backup of accounts books...

How to File return of income of Fair Price shop ?
Purchase and sales of goods or only commission income ?

Received Issue with Refund Intimation u/s 143(1) 15 days back but at income tax portal "Processing Completion" still showing pending. Please guide but to do. Profile/bank and everything is up to date already.