What is the 2nd source of income? I ask, because it matters. Since HI does not have a "sales tax" per-se, they have a GET tax. (General Excise Tax, for those reading that don't know what GET stands for.) The tax rate depends on the business. The tax rate is 0.15% for Insurance Commission, 0.5% for Wholesaling, Manufacturing, Producing, Wholesale Services, and Use Tax on Imports For Resale, and 4% for all others. More than likely, you're at 4% for "all others".
Remember, you have to file/pay the GET tax quarterly too. The TTX program does not "do" quarterly filings/payments or anything. See https://tax.hawaii.gov/geninfo/get/ to get more information on this.
