When a business hits $30,000 of revenue in four consecutive calendar quarters, it must register to collect goods and services tax (GST). Voluntary registration is also available before passing this threshold. This applies to sole proprietors and corporations.A registrant tracks GST collected and GST paid on expenses (called input tax credits or ITCs). This can be onerous, especially for a smaller sole proprietor. The GST quick method is a simplified reporting option for small businesses reg