# Unable to change Default Tax Rate of the product after update to 20.0.2 **URL:** \ **Category:** Using my Dolibarr\ **Created:** [December 18, 2024, 7:01am UTC](https://www.dolibarr.org/forum/t/unable-to-change-default-tax-rate-of-the-product-after-update-to-20-0-2/29740 "2024-12-18T07:01:43Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![sribalaji.tvn](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/s/848f3c/32.png) [@sribalaji.tvn](https://www.dolibarr.org/forum/u/sribalaji.tvn)\ **Post date:** [December 18, 2024, 7:01am UTC](https://www.dolibarr.org/forum/t/unable-to-change-default-tax-rate-of-the-product-after-update-to-20-0-2/29740/1 "2024-12-18T07:01:43Z")
After 20.0.2 update, we are receiving blank screen when we try to change default tax rate of the product. ---
**Author:** ![jonbendtsen](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/j/977dab/32.png) [@jonbendtsen](https://www.dolibarr.org/forum/u/jonbendtsen)\ **Post date:** [December 18, 2024, 7:08am UTC](https://www.dolibarr.org/forum/t/unable-to-change-default-tax-rate-of-the-product-after-update-to-20-0-2/29740/2 "2024-12-18T07:08:39Z")
what can you see in the webserver log and in the dolibarr.log file (possibly more useful if you enable debug logging, try visiting this page and then switch off debug logging ---
**Author:** ![sribalaji.tvn](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/s/848f3c/32.png) [@sribalaji.tvn](https://www.dolibarr.org/forum/u/sribalaji.tvn)\ **Post date:** [December 18, 2024, 7:25am UTC](https://www.dolibarr.org/forum/t/unable-to-change-default-tax-rate-of-the-product-after-update-to-20-0-2/29740/3 "2024-12-18T07:25:28Z")
> [@jonbendtsen](#): > > switch off debug logging **Fatal error** : Uncaught TypeError: Unsupported operand types: string \* int in /product/class/product.class.php:2378 Stack trace: #0 /product/price.php(223): Product-\>updatePrice() #1 {main} thrown in **/product/class/product.class.php** on line **2378** Is it helpful for you?? ![doli2](https://www.dolibarr.org/forum/uploads/dolibarrorg/original/2X/6/6a7b62f51036ecaffddcc4c63662dbb3e1a62f81.png) ---
**Author:** ![jonbendtsen](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/j/977dab/32.png) [@jonbendtsen](https://www.dolibarr.org/forum/u/jonbendtsen)\ **Post date:** [December 18, 2024, 5:15pm UTC](https://www.dolibarr.org/forum/t/unable-to-change-default-tax-rate-of-the-product-after-update-to-20-0-2/29740/4 "2024-12-18T17:15:40Z")
which PHP version are you using? see it here: top menu: Home left menu: Admin Tools, About PHP ---
**Author:** ![sribalaji.tvn](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/s/848f3c/32.png) [@sribalaji.tvn](https://www.dolibarr.org/forum/u/sribalaji.tvn)\ **Post date:** [December 18, 2024, 5:38pm UTC](https://www.dolibarr.org/forum/t/unable-to-change-default-tax-rate-of-the-product-after-update-to-20-0-2/29740/5 "2024-12-18T17:38:22Z")
PHP version - 8.1.31 ---
**Author:** ![jonbendtsen](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/j/977dab/32.png) [@jonbendtsen](https://www.dolibarr.org/forum/u/jonbendtsen)\ **Post date:** [December 18, 2024, 5:59pm UTC](https://www.dolibarr.org/forum/t/unable-to-change-default-tax-rate-of-the-product-after-update-to-20-0-2/29740/6 "2024-12-18T17:59:40Z")
@sribalaji.tvn I think you should file a bug report here > **[Issues ยท Dolibarr/dolibarr](https://github.com/Dolibarr/dolibarr/issues)** > > Dolibarr ERP CRM is a modern software package to manage your company or foundation's activity (contacts, suppliers, invoices, orders, stocks, agenda, accounting, ...). it's an open source W... please include dolibarr and php version as well as the picture of the error ---
**Author:** ![sribalaji.tvn](https://www.dolibarr.org/forum/letter_avatar_proxy/v4/letter/s/848f3c/32.png) [@sribalaji.tvn](https://www.dolibarr.org/forum/u/sribalaji.tvn)\ **Post date:** [April 2, 2025, 3:06pm UTC](https://www.dolibarr.org/forum/t/unable-to-change-default-tax-rate-of-the-product-after-update-to-20-0-2/29740/8 "2025-04-02T15:06:07Z")
Fixed in V21.0.0 Thank you