If merchant is maintaining inclusive of tax rate in Tally, its a Feature request in Mobile app.
Disposition > If resolved Feature request - Feature request
If Merchant want inclusive of tax rate in Mobile app, it can be done manually.
Steps to Follow:
Enable rate with Tax in Data entry > voucher> Add Rate with Tax.
Now merchant can add the inclusive of tax rate of an item while creating the entry manually.
It is not required to add the item rate instead merchant can add the inclusive of tax rate in Add rate with tax.
When merchant add the inclusive of tax rate in Add rate with tax field, the item rate and tax will get auto calculated.
Disposition > If resolved Mobile app Troubleshooting - Data entry setting/issue