where to claim the gst credit ?

[jcooperman]

Where in TurboTax online do I enter the info to claim the GST credit (for GST paid on employment / self employment expenses) ?

[TurboTaxSusan]

For Employment expenses, you'll see info on the GST/HST rebate. 

If you are self-employed and not registered to collect GST/HST, then the sales tax is just included as part of your expenses. If you are registered to collect GST/HST, then you have to submit a separate GST/HST return.