你好。是否有查清楚为何IRB charge 多22k?
若要进行回扣,你一定要有证明。不要SIGN同意书先,NEGOTIATE with the Officer first. Mention to them is tehnical errors and NOT TAX AVOIDANCE.
Before they issue the revised assessment, you can substanciate wt suuporting proofs.
I'll pm you the Auditor/tax agent's details, may be you can seek their advice.