In case if tax payable amount is not matching ledger balance in gst summary,follow these steps
Step 1 First of all,check the report in short range
Step 2 Then on particular date,check all cgst,sgst and igst entries.
Step 3 In all tax entries of adjustemnt,check gst nature,as if it will be not applicable,then it will affect on ledger not gst reports and also check tax applicablity in voucher entries
Stpe 4 Now after reconciling ledger entries in short range,by using F4 in gst summary,check all adjustment entries also and then check,tax payable amount will be matched with ledger balance
Note:In case some entreis does not reflect in gst summary after proper tax applicablity,then under housekeeping option,run update gst summary partially after taking backup of company