Can someone help me with this form DR-405? I do not know why I'm filling it and where to find account/parcel number.

[DawnC0]

You can most likely delete that Florida Tangible Personal Property form.  Florida does not have a state income tax.   Only people who have Florida businesses or rental property with tangible personal property have to file a DR-405 with the county property appraiser by April 1.  

http://dor.myflorida.com/dor/property/tpp/

If you don't have a Florida business or rental property with such tangible personal property, then you do not have to file a Florida return.  You can choose to skip the Florida return or delete the Florida return before paying and filing if it's not needed.

https://ttlc.intuit.com/questions/1900608-how-do-i-delete-my-state-return-in-turbotax-online