Hi Chlim,
Goo morning. As there is no details of the product, based on provided details :
a. If online, could be lagging internet connection
b. If downloadable software , it may have frozen screen
Best way to deduce would be to connect with customer care. Please use the best options from page
https://turbotax.community.intuit.ca/turbotax-support/en-ca/help-article/tax-return/contact-us/L1h8P3E0x_CA_en_CA?uid=lh507w4x
Hope this helps. Regards.