Bug with T4A OAS Box 21 (GIS) generating provincial tax?

Hi,

After entering the amount from Box 21 on the T4A (OAS) slip (Guaranteed Income Supplement), TurboTax is calculating provincial tax, which results in a balance due. However, according to Canada.ca, this amount is non-taxable.

When I remove the amount from Box 21, the provincial tax balance goes to zero. Is there a way to adjust TurboTax to properly treat the GIS as non-taxable for provincial tax (Quebec resident)?

Thanks