GST not splitting out

Help please.

I have set up a new business in MYOB Essentials.  It's all set up for GST and the accounts are flagged as GST.  I have about 3 months of data in there now from loading up a QIF file from my bank.

Issue is, the GST has not been split out so my activity statement does not show any GST (except for one journal I did, which correctly had the GST automatically spilt out).

Thanks

Matt