Add support for itemized tax rates (#2862)

* Prevent empty tax rates backups

* Improve backup file names

* Allow to change Display tax totals option

* Add itemized_taxes property and method

* Add missing property declaration

* Backup tax rates when switching between itemized and total taxes

* Add support for itemized taxes

* Add changelog entries

* Add itemized tax rate name

* Improve documentation for `generate_itemized_tax_rate_name` method in TaxJar integration

* Refactor: Rename `itemized_taxes` to `is_tax_display_itemized` and improve method documentation in TaxJar integration

---------

Co-authored-by: Dustin Parker <11618203+dustinparker@users.noreply.github.com>

Author: bartech

changelog.txt

@@ -1,5 +1,8 @@
 *** WooCommerce Tax Changelog ***
 
+= 3.1.0 - 2025-xx-xx =
+* Add   - Support for Itemized tax rates.
+
 = 3.0.5 - 2025-07-14 =
 * Tweak - WooCommerce 10.0 Compatibility.
 

classes/class-wc-connect-functions.php

@@ -162,6 +162,10 @@ public static function backup_existing_tax_rates() {
 				)
 			);
 
+			if ( empty( $rates ) ) {
+				return false;
+			}
+
 			ob_start();
 			$header =
 				__( 'Country Code', 'woocommerce' ) . ',' .
@@ -258,7 +262,7 @@ public static function backup_existing_tax_rates() {
 
 			$csv        = ob_get_clean();
 			$upload_dir = wp_upload_dir();
-			$backed_up  = file_put_contents( $upload_dir['basedir'] . '/taxjar-wc_tax_rates-' . date( 'm-d-Y' ) . '-' . time() . '.csv', $csv );
+			$backed_up  = file_put_contents( $upload_dir['basedir'] . '/taxjar-wc_tax_rates-' . date( 'Y-m-d' ) . '-' . time() . '.csv', $csv );
 
 			return (bool) $backed_up;
 		}
@@ -278,7 +282,7 @@ public static function get_backed_up_tax_rate_files() {
 				return false;
 			}
 
-			$files = [];
+			$files = array();
 			foreach ( $found_files as $file ) {
 				$filename           = basename( $file );
 				$files[ $filename ] = $upload_dir['baseurl'] . '/' . $filename;