fix: broken links

Author: jssql1234

docs/usage/gst/gst-treatment.md

@@ -270,7 +270,7 @@ GST-03 item 16 Capital Goods Acquired = Rm75,000.
    | Machinery        | 63,000.00 |           |
    | Oversea supplier |           | 63,000.00 |
 
-2. When it comes to the forwarder bill after declaring the import goods, you must follow our GST Import Goods guideline. Refer to this link [1](../../usage/gst-and-sst/gst#gst-treatment-import-goods-im).
+2. When it comes to the forwarder bill after declaring the import goods, you must follow our GST Import Goods guideline. Refer to this link [1](../../usage/gst/gst-treatment.md#import-goods-im).
 
 3. You just have to select Fixed Asset Account at the item line updated from the GST Imports screen. (**Don't worry, Rm75,000 fixed asset will not post into your account book**). See the screenshot attached.
 

docs/usage/supplier/guide.md

@@ -99,7 +99,7 @@ This setting set the supplier who has supply the taxable goods under the Sales T
 |                | • Related Topic: [Maintain Stock Item → Main Header](../../usage/stock/guide#maintain-stock-item)                    |
 | Tax            | • Select an appropriate tax code that falls under the Person Exempted in **Schedule C ONLY** (must be declared in SST-02). |
 |                | • Schedule C tax code: PEC1, PEC2, PEC3, PEC4, PEC5                                                                        |
-|                | • Lookup: [Maintain Tax](../../usage/gst-and-sst/gst#maintain-tax)                                                         |
+|                | • Lookup: [Maintain Tax](../../usage/gst/gst-maintain-tax.md)                                                         |
 
 #### Bank Account