I apologise if this has been posted before and I have missed it.

Ancestry now has what it calls the "UK Land Tax Redemption 1798" searchable on-line. This is a Land Tax Assessment carried out in 1798 on land with a value of 20s or more; land valued at less than 20s was exempt.

From my exploration of these records the emphasis is on LAND so unless your ancestors were proprietors or occupiers of land they may not be there. I have a Webb ancestor in Ampthill Bedfordshire who was an innkeeper there in 1797 who is not listed.

I have Couldwell ancestors who were farmers in Thurgoland Yorkshire and they are listed. I have also been able to take a Howe family back one generation (provisionally) from these records. The family were farmers in Upper Hallam Yorkshire and I had them back to William Howe born in Upper Hallam in 1783. There is only one Howe in Upper Hallam in the records of 1798 -- John Howe occupying land owned by the Duke of Norfolk.

Good luck in your research.

Malcolm Webb
Lincoln UK