Taxes incorrectly added in Valuation

Hi! Anyone who can help me how to reverse the taxes due to government added in valuation without cancelling the purchase receipt. Is it possible to reverse thru landed cost voucher @ negative value without issue?

Appreciate for any help.

I tried this process in our ERP test and seems to be working fine as I wanted - decrease the valuation of stock and expenses included in valuation. But before I make this a process, i hope someone can vouch if this has no issues in other accounts.