Impact of rcm in gstr-3b dealing with banks

No That's is not the problem because this is outward supply and GST has been paid by the Banks under RCM but i don't have any tab for showing that in my client GSTR-3B.

There is no such option in GSTR 3B.

In my opinion, this should be reported under 3.1 (a). Taxable value should include the value of outward supply under RCM but the tax amount should be without considering the outward supply under RCM. 

In GSTR-1 I have shown as normal bill in b2b section but only difference is that i am tick the box showing payment made by suppliers under RCM but that option not in GSTR-3B. If i will show in table 3.1(a) then there must be GST amount entered in respective boxes so 3.1(a) also not available.

Not required to show amount in respective tax column of 3.1.a. for outward supply under RCM.

GSTR 1 and 3B will be tallied only in this way. There is no other option to report such transaction and in my opinion, this is the reason that tax columns of 3.1.a are not auto populated and we have to enter amount of tax considering the impact on taxable outward supply.

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I have tried to enter in table 3.1(a) but if i will not insert CGST/SGST amount then i will not able to confirm the same because it is mandatory to insert figure of GST with net taxable supply. In second scenario if i will input GST figures then my liablity create and i have to paid it so that's also not possible.

If you only have outward supply under RCM, then no need of GST registration and no need to file return.

In your case, if you are registered and submitting return, then you must have outward supply under normal mechanism as well as under RCM. So, your taxable value of outward supply must include outward supply under normal and under RCM and hence tax column is not supposed to blank.

Dear Saurabh

I am also file return from Aug 2018 the way you suggested so thanks for advice.