Retirement tax questions

Ok I think I understand.  It is an in service direct rollover that Fidelity allows.  So they are not withholding any money so they full amount rolls over but a tax liability will still be realized at the end of the year right?  I think this will work out perfectly for what I need to accomplish.  I’ll just need to calculate my expected wages and tax liability and do a Roth conversion for the rest.  Thanks!