Prepare an index for batching

Filters an efiler index to the requested tax years and form types, and removes duplicate filings (by URL). Ported from the irs990efile package.

Usage

prep_index(years = NULL, index, form.type = c("990", "990EZ"))

Arguments

years

Optional vector of tax years to keep. If NULL, all years in index are used.

index

Data frame with at least TaxYear, FormType, and URL columns.

form.type

Character vector of form types to keep (default c("990", "990EZ")).

Value

A filtered, de-duplicated copy of index.