Entry for Sales Return is opposite of Sales
We know that Sales Entry is
Party Dr
To Sales
So, Sales Return entry will be
Sales Return Dr
To Party
(Instead of Sales Return Account, some people use Sales Account which is also correct)
Similarly, Entry for Sales Return with GST will be
Sales Return Dr
Output GST Dr
To Party
Note
Output GST will be Debited, (not Input) because When we sell we have to pay output. We return goods, we reduce this output