We rent a office for 6,000 Baht, we pay 5,700 Baht to the owner and 300 Baht Tax to Revenue Department, as you not

pay before 7th day of the month you must pay 2,000 Baht costs. Is this correct.

Also by telephone bills, we received invoices from TOT with 7% VAT but when we go TOT we make a paper (4x) from the 100 Baht we pay 5% and from connect costs 3% Tax now after 6 months tells the accountant that we also must pay every month to Revenue Department Tax and when you not pay before the 7th you must pay costs.

Who can give advise what to do.

Where can you find in English the rules for accounting and tax.

Tax by rent is 5%, I don't know in how many days you must pay, the first time we pay to late but accounting office change that we now pay every 2 months the tax and we no pay costs.