How do I import 2018 tax return from H & R block delux to 2018 Turbo tax? I have the file in txf and pdf format. None works. Is there a drag and drop option?

2018 to 2018?  OR do you mean transfer a 2017 HRB return to 2018 Turbo Tax?  You can't do anything with a 2018 HR Block file except to maybe transfer it into 2019 NEXT YEAR.  

To Transfer from 2017 into 2018 Online Turbo Tax see....If you used other software

https://ttlc.intuit.com/community/entering-importing/help/how-do-i-transfer-last-year-s-return-into-turbotax-online/00/25953 

To Transfer into Windows Desktop program, https://ttlc.intuit.com/community/entering-importing/help/transfer-last-year-s-return-to-turbotax-for-windows/00/26145

To Transfer into the MAC Desktop program, https://ttlc.intuit.com/community/tax-data-file/help/how-do-i-transfer-last-year-s-return-into-the-turbotax-for-mac-software/00/26062

So what version do you want to transfer Block to?

Transfer from an electronic PDF file (not a scanned pdf) to Turbo Tax for Windows Desktop program

https://ttlc.intuit.com/questions/4120237-can-i-transfer-from-a-pdf-to-2017-turbotax-for-windows 

Info on Transferring a PDF file to Mac Desktop software
https://ttlc.intuit.com/questions/4117672-can-i-transfer-from-a-pdf-to-2017-turbotax-for-mac