Hi there!  Amounts fluctuate quite a bit throughout the compilation process. I would use this calculator to get a ballpark figure of where you should end up with your federal return to see if it is more likely the $1,000 or the -$4,000.

Use the TurboTax calculator  TaxCaster  to get an estimate of a tax refund or the taxes owed (including for tax year 2018) -  https://turbotax.intuit.com/tax-tools/calculators/taxcaster/